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US 2004/0105761 A1Published application
High-pressure fuel pump with integrated blocking-vane prefeed pump
AssigneeRobert Bosch GmbH
InventorsWolfgang Fehlmann, Juergen Frasch
Life of this patent
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Abstract
A high-pressure fuel pump having at least one pump element is driven by a camshaft. An inside chamber of the pump housing, together with the cam-shaped portion of the camshaft and a blocking vane, forms a blocking-vane pump, which can act as a prefeed pump for the at least one pump element, whereby a prefeed pump can be integrated with the high-pressure fuel pump, which saves both production costs and installation space.
Claims19
A high-pressure fuel pump for an injection system of an internal combustion engine, comprising
- a pump housing,
- at least one pump element (15),
- a camshaft (3) for driving the pump element (15), and
- a blocking vane (37),
- the pump housing (1), the camshaft (3), and the blocking vane (37) cooperating with the camshaft (3) to form a blocking-vane pump which pumps fuel to the at least one pump element (15).
2 more elements
Dependencies are inferred from the claim text.